-----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von Ted Miller Gesendet: Freitag, 16. August 2013 18:29 An: [email protected] Betreff: [Gluster-users] standby-server
I am looking at glusterfs for a HA application w/o local tech support (don't ask, third-world country, techs are hard to find).
My current plan is to do a replica-4 + hot spare server. Of the four in-use bricks, two will be on "servers" and the other two will be on a "client" machine and a "hot-backup" client machine. No striping, all content on each local machine, each machine using its own disk for all reading.
Part of my plan is to have a cold-spare server in the rack, not powered on.
(This server will also be a cold spare for another server).
I am wondering if this would be a viable way to set up this configuration:
Set up glusterfs as replica-5.
1. server1 2. server2 3. client 4. client-standby 5. server-spare
Initialize and set up glusterfs with all 5 bricks in the system (no file content). Install system at client site, and test with all 5 bricks in system.
Shut down spare server.
Once a month, power up spare server, run full heal, shut down. Power up server-spare for any software updates.
If server1 or server2 dies (or needs maintenance), tell them to power up server-spare, and let it heal.
It seems to me that this would be easier than setting up a replica-4 system and then jumping through all the hoops to replace a server from scratch.
Comments, reactions, pot-shots welcome. Ted Miller
Ted Miller Design Engineer HCJB Global Technology Center Elkhart, IN 46517
On 8/19/2013 2:38 AM, Daniel Müller wrote:
What ist he reason about a "spare server" ? With gluster just replicate to the real status all the time!?
This is a hot, tropical location with terrible power, a lot of lightning storms and only part-time air-conditioning. Hardware failures are common. I am doing what I can to protect against the power problems, but it is still an environment that is very hard on equipment. This system will be business-critical--it is a radio station, and their music and other programs will be on the glusterfs, with downtime beyond seconds becoming dead air.
If there is a catastrophic event, I want the spare server to have been off, and thus (most likely) not damaged. It can be brought on-line to restore dual server status.
Or just do geo replication to a non gluster machine!?
I plan on doing geo-replication, but restoring a multi-terabyte file system over a 4Mb link will take days. We would probably have to rsync the file system to portable drives and fly them over.
Hope that helps the perspective a bit. Ted Miller
----------------------------------------------- EDV Daniel Müller Leitung EDV Tropenklinik Paul-Lechler-Krankenhaus Paul-Lechler-Str. 24 72076 Tübingen Tel.: 07071/206-463, Fax: 07071/206-499 eMail: [email protected] Internet: www.tropenklinik.de ----------------------------------------------- _______________________________________________ Gluster-users mailing list [email protected] http://supercolony.gluster.org/mailman/listinfo/gluster-users
Ted Miller Design Engineer HCJB Global Technology Center Elkhart, IN 46517 _______________________________________________ Gluster-users mailing list [email protected] http://supercolony.gluster.org/mailman/listinfo/gluster-users
